The Education Department removed the secretary from the school but kept Bost in place. He was sent to sexual harassment training and put on probation for two years, officials said.

This spring, the Office of Equal Opportunity opened another probe into whether Bost has created a hostile work environment in the school, officials said.

The office is investigating additional claims of sexual harassment and whether Bost was sexually involved with two teachers at the school, sources said.

"It's very fearful and it's chaotic," said a teacher who asked to remain anonymous. "It's not an environment that's conducive for student learning."

Bost said he was the victim of a campaign against him by employees.

"I've got a few people in the school who are extremely negative," he said. "They take it out on other staff, they take it out on the children and they take it out on me."

Some teachers said they didn't believe the charges.

"Mr. Bost has been one of the best mentors," said first-year teacher Naya Sue. "He comes into my classroom a lot, making sure I'm doing the right thing."

An Education Department official noted that none of the findings involved students.

"If further allegations are determined to be true, we will take swift and appropriate action," said Danny Kanner. "We strongly encourage anyone who has been treated improperly to come forward, and we will investigate."